1、 MIL-HDBK-509 m 0 0263357 TTO W a NOTE: MIL-STD-338(AT) has been redesignated as a handbook, and is to be used for guidance purposes only. This document is no longer to be cited as a requirement. For administrative expediency, the oniy physical change fiom MIL-STD-338(AT) is this cover page. However
2、, this document is no longer to be cited as a requirement. If cited as a requirement, contractors may disregard the requirements of this document and interpret its contents only as guidance. NOT-MEASUREMENT MIL-HDBK-509(AT) 7 December 1998 DEPARTMENT OF DEFENSE HANDBOOK CLEANING AND TREATMENT OF ALU
3、MINUM PARTS PRIOR TO PAINTING AMSC NIA AREA- DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIESTD-3 3 8(AT) DEPARTMENT OF DEFENSE Washington, DC 20301 Cleaning and Tr
4、eatment of Aluminm Prior to Painting 1. This Military Standard is approved for use by US Army Tank-Automotive Command, Department of the Army, and is available for use by ail Departments and Agencies of the Department of Defense. 2. Beneficial qormnents (recommendations, additions, deletions) and an
5、y pertinent data which may be of use in improving this document should be addressed to: U.S. hy Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the seif-addressed Standardization Document Improvement Proposal D Form 1426) appearing at the end of this document or by letter.
6、ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-33 8(AT) FOREWORD Aluminum and aluminum wrought products during rolling, extrusion, drawing, forging, stamping and other processing accumulate oxides, mill scale, dirt and oils that must be r
7、emoved to provide a sound base for paint. The purpose of this document is to fiimish the requirements for cleaning and chemical treatment to provide this paint base. . 111 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-509 U 9999970 0263360
8、 595 CONTENTS page Paragraph 1 . SCOPE 1 1 1 Scope 1 2 2 . REFERENCED DOCTJMENTS 2.1 Government documents 2 2.2 Other publications 2 2.3 Order of precedence . 2 3 . 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 4 . 4.1 4.1.1 4.2 4.2.1 4.2.1.1 4.2.1.2 4.2.1.3 4.2.1.2 4.2.2 4.2.2.1 4.2.2.2 4.2.2.3 4.2.2.4
9、4.2.3 4.2.4 DEFINITIONS Source . Alkaline cleaner causticdip Chromate cleaning . Conversion coating DeoxodiPng . Etching . Water break . Recovered materials . Solid waste GENERAL REQUIREMENTS . Aluminum dace treatment . Cleaning and treatment sequence Cleating and treating requirements Processing of
10、 individual parts and welded assemblies . Nonwelded detail parts Parts for resistance welded assemblies . Parts for fusion welded assemblies Steelparts . Application of processes . Processing Coverage . Operation details . Safety precautions Welded assemblies Recycled, virgin and reclaimed materials
11、 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 6 5 . DETAILEDREQUREMENTS . 7 5.1 Atuminumsurf8cetreatment . 7 5.1.1 Preclean . 7 5.1.1.1 Contamination 7 5.2 Auralinecleaning 7 5.2.2 Application and control . 7 5.2.3 Allcaline cleaning bath mainenance . 7 5.2.3.1, Ridoline 357 titration . 7 iv
12、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-509 W 9999970 02633bL 4231 = Paragraph 5.2.3.2 5.2.4 5.2.4.1 5.3 5.4 5.4.1 5.4.2 5.4.3 5.4.3.1 5.4.3.2 5.4.3.3 5.4.3.4 5.4.3.5 5.4.3.5.1 5.4.3.5.2 5.4.3.5.2 5.4.3.6 5.5 5.6 5.6.1 5.6.2 5.6.3 5.
13、6.3.1 5.6.4 5.6.5 5.6.5.1 5.6.5.2 5.6.5.3 5.7 5.8 5.8.1 5.8.2 5.8.3 5.8.3.1 5.8.3.2 5.8.3.3 5.8.3.4 5.8.3.5 5.8.3.6 5.8.3.7 5.9 5.10 CONTENTS Ridoline 357 replenishment Equipment Bath maintenance requirement Post alkaline cleaner rinse . Deoxidizer bath make-up Deoxidizer application and control . A
14、mchem deoxidizer No 6-16 bath maintenance . Acid titration Sulfuric acid bath replenishment Deoxidizer titration . Replenishment of deoxidizer . Reaction product titration Control of reaction products . Reaction products level . Operational notes . Equipment Post deoxidizer rinse . Chromate chemical
15、 conversion coating . Aodine 12008 bath make-up . Alodine 12008 application and control points Maintenance of chromate conversion bath . Modine coating chemical titration . Replenishment of chromate conversion bath Continuous high volume operation . Conversion coating equipment Post conversion coati
16、ng equipment Final acidulated rinse . Deoxylyte rinse make-up Deoxylyte application and control . Maintenance of deoxylyte bath . pH adjustment of hard or alkaline water . Alkalinity titration . Hexavalent chromhm titration . Correction factor . Calculation of hexavalent chromium titration Deoxylyte
17、 recommendations and precautions Final acidulated rinse equipment Deoxidizer Chromate conversion coating operational notes . Chromate conversion operation precautions . Final acidulated rinse drying . Paa;e 8 8 8 8 8 8 8 8 9 9 9 10 10 10 10 11 11 11 11 11 11 11 11 12 12 13 14 14 14 14 14 14 15 15 15
18、 15 16 16 16 18 18 Quality assurance provisions 18 V Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-509 9999970 02b33b2 3b8 CONTENTS Page Paragraph 6 . NOTES . 19 6.1 Intendeduse 19 6.2 Subject term (key word) listing 19 6.3 Supersession da
19、ta . 19 vi Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-507 i0 0263363 2T4 MIL-STD-3 3 8(AT) 1. SCOPE 1.1 Scope. This document contains the requirements for nonelectrolytic chemical surface treatment of aluminum and aluminum alloys prior
20、to painting. 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-509 9999970 02b33b4 I130 W 2.1. i Soecifications. Unless otherwise specified, the following specification of the issue listed in that issue of the Department of Defense index of
21、Specifications and Standards (DoDISS) specified in the solicitation forms, a part of this standard to the extent specified herein. SPECIFICATION MILITARY MIL-C-5541 - Chemical Conversion Coatings on Aluminum and Aiuminutn AllOyS. 2.2 Other Dublications. The following document forms a part of this st
22、andard to the extent specified herein. The issue of the document which is indicated as DOD adopted shall be the issue listed in the issue of the DODISS specified in the solicitation. The issue of the document which has not been adopted shall be that in effect on the date of the cited DODISS. AMERICA
23、N SOCIETY FOR METALS Glossary of Metallurgical Tenns and Definitions (Application for copies should be addressed to Amencan Society for Metals, Metals Park, Ohio 44073.) (Nongovernment standards are generally available for reference fiom Iiraries. They are also distributed among technical groups and
24、 using Federal agencies.) MIL-STD-338(AT) 2. REFERENCED DOCUMENTS 2.1 Government documents. 2.3 Order of ordence. In the event of a conflict between the text of this standard and the references cited herein, the text of this stanard shall take precedence. 2 Provided by IHSNot for ResaleNo reproducti
25、on or networking permitted without license from IHS-,-,-MIL-HDBK-509 9999970 02b33b5 077 MIL-STD-33 8(AT) 3. DEFINITIONS 3.1 Source. The following definitions are derived from the American Society for Metals Glossary of Metallurgical Terms. 3.2 Alkaline cleaner. A material blended from allcali hydro
26、xides and such aikaiine salts are borates, carbonates, phosphates or silicates. The cleaning action may be enhanced by the addition of surface active agents and special solvents. 3.3 Caustic din A strong alkaline solution into which metal is immersed for etching, for neutralizing or for removing org
27、anic materials such as grease or paint. 3.4 Chromate treatment. A treatment of metal in a solution of a hexavalent chromium compound to produce a conversion coating of trivalent and hexavalent chromium compounds. 3.5 Conversion coating. A coating consisting of a compound of the surface metal produce
28、d by chemical or electrochemical treatments of the metal. 3.6 Deoxidizing. In metal finishing the removal of oxide films fiom metai surfaces by chemical or electrochemical reaction. 3.7 Etching. Chemically or electrochemically removing tenacious films from a metal surface to condition the surface fo
29、r subsequent treatment such as painting. 3.8 Water break. The appearance of a discontinuous lm of water on a surface signiIjing nonuniform wetting usually associated with a surface contamination. 3.9 Recovered materiais. “Recovered materials” means materials that have been collected or recovered fro
30、m solid waste (see 3.10). 3.10 Solid waste. “Solid waste” means (a) any garbage, refuse, or sludge from a waste treatment plant, water supply treatment plant, or air pollution control facility; and (b) other discarded material, including solid, liquid, semisolid, or contained gaseous material result
31、ing from industrial, commercial, mining, and agricultural operations, and from community activities. It does not include solid or dissolved material in domestic sewage, or solid or dissolved material in irrigation return flows or industrial discharges which are point sources subject to permits under
32、 section 402 of the Clean Water Act, (33 U.S.C. 1342 et seq.), or source, special nuclear, or byproduct material as dened by the Atomic Energy Act of 1954 (42 U.S.C. 201 1 et seq.) (Source: Federal Acquisition Regulations, section 23.402). 3 Provided by IHSNot for ResaleNo reproduction or networking
33、 permitted without license from IHS-,-,-MIL-HDBK-509 m 9999970 02b33bb TO3 MIL-STD-33 8(AT) 4. GENERALREQUIREMENTS 4.1 -. 4.1.1 Cleaning - and treatment sequence. Aluminum parts shall be surf8ce treated to resist Step 1. Preclean (see 5.1.1). corrosion and provide a base for painting in the followin
34、g sequence: 2. Alkaline cleaning (see 5.2). 3. Post aikaine cleaner rinse (see 5.3). 4. Deoxidizer (see 5.4). 5. Post deoxidizer rinse (see 5.5). 6. Chromate chemical conversion coating (see 5.6). 7. Post conversion coating rinse (see 5.7). 8. Final acidulated rinse (see 5.8). 9. Drying (see 5.9). 4
35、.2 Cleaning and treating requirements. 4.2.1 Processing of individual parts and welded assemb lies. 4.2.1.1 Non-welded detail parts. Non-welded detail parts shall be cleaned and chromate 4.2.1.2 Parts for resistance welded assemblies. Parts going into spot welded assemblies 4.2.1.3 ws. In general, f
36、iision wdded assemblies shali be conversion coated per section 5 before being assembled into the body. shaii be cleaned and chromate conversion coated per section 5 before spot welding. cleaned and chromate conversion coated per section 5 after welding. Exceptions wherein the detail parts are chroma
37、te conversion coated and then welded are indicated by the drawings. An example exception is the welded folding windshield he which is a My enclosed bework. 4.2.1.4 Steel parts. Steel parts will not receive the treatments covered by this standard. Body applied steel parts shall be plated as indicated
38、 on the detail drawings. 4.2.2 Auplication of processes. 4.2.2.1 Processing. The cleaning and treating processes given in section 5 may be appiied by spray or immersion. Ail processing shall be done continuously, i.e., there however, ail materials shall be new and unused. The use of recycled or recl
39、aime (recovered) materiais is acceptable provided that aii other requirements of this standard are met (see 3.9). 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-SO9 9999970 O263369 712 5. DETAILED REQUIREMENTS 5.1 Aluminum surface treatme
40、nt. Aluminum and aluminum alloy parts shaii be surface treated to provide increased corrosion protection and a sound paint base in the steps specified in4.1.1. 5.1.1 Preclean. 5. i. i. 1 Contamination. Gross organic contamination shall be removed by solvent degreasing or by the use of a pre-wipe cle
41、aner such as Amchem P3-T 5156. This step shall be necessary only when heavy organic contamination is present. The exact nature of this operation shall be dictated by the amount and type of contamination. rough or steel wire shd not be used for any cleaning operation. Particles fkom these products ma
42、y become embedded in the aluminum and accelerate its corrosion. 5.2 Alkaline cleaning. Amchem Ridolime 357 (spray/powder) shall be used to remove surface contamination and produce a water break-fiee sudace, Amchem Ridoline 357 is a silicated, inhibited, non-etching, non-smutting alkaline cleaner. sh
43、all be dissolved in a separate container of water, mixed well and added to the bath per 100 gallons (gais) of final solution. following controls 5.1.1.2 Precleaning precaution. Abrasives containing iron such as steel wool, iron oxide, 5.2.1 Ridoline bath make-up. To prepare this cleaner 12.5 pounds
44、(Ibs) of Ridoline 357 5.2.2 ADplication and control. Ridoline 357 shall be applied by spraying with the Temperature 140 to 160 degrees Fahrenheit (OF) Spray tie not less than 1 minute minimum Nozzle pressure 15 to 20 pounds per square inch (psi) Titration 9 to 15 milliliter (mi) 5.2.3 Alkaline clean
45、in- bath maintenance. The Amchem Ridoline 357 bath shall be 5.2.3.1 Ridoline 357 titration. controlled in the plant by titration using Amchem Test Set No. 3634 or its equivalent. Step 1 : Pipette a 10 ml sample of the Ridoline 357 bath into a beaker. Step 2: Add approximately 100 mi of water and 4 t
46、o 6 drops of Indicator Solution 2 Step 3: Fill the automatic burette to the zero mark with Titrating Solution 20 Step 4: While stirring the sample, slowly run in Titrating Solution 20 from the automatic Step 5: The number of milliliters of Titrating Solution 20 used shall be recorded as the (Brom Cr
47、esol Green). The solution wili turn blue. (O. 1 N hydrochloric acid). burette until the color changes from blue to yellow. Ridoiiie Titration. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-HDBK-5Oq qqqq=J?O 0263370 434 J MIL-STD-3 3 8(AT) 5.2
48、.3.2 Ridolie 357 replenishment. To replenish the Ridoiine 357 solution 1.25 lb of Ridoline 357 shaU be added for each 100 gals. per milliliter (mi) lacking. The titration however, the Amchem technical representative may suggest a deviation fiom this data if indicated by local conditions. d. If the A
49、lodine coating is powdery, the cause may be one or more of the following: (1) The work has been improperly cleaned and/or rinsed. (2) The concentration of the Aiodine coating chemica(s) in the bath is too high. (3) The Alodine coating chemical bath has become contaminated with (4) The coating time is too long. (5) The bath temperature is to h
